Sprike | Free VST / AU Virtual Analog Synthesizer by Cognitone

Sprike is a free Virtual Analog Synthesizer for Windows and Mac (VST, VST3 and AudioUnits and is an extended version of Tunefish4, originally created by Brain Control, with modifications and enhancements added by Cognitone.

While the actual sound synthesis was not changed (in fact, you can import your existing Tunefish4 presets), Sprike features a differently organized preset storage, 4 additional MOD sources, an on-screen keyboard, a level meter, tempo-controlled delay units, and a more complete MIDI implementation with bank plus program selection, in order to integrate more transparently with MIDI-controlled environments and conventions.